PBDB Collection

Cañadon Hondo, Bird Clay locality: Casamayoran, Argentina

List of taxa

Where & when

Geology

Taphonomy & methods

Metadata & references

Taxonomic list

Reptilia

	Aves indet. Linnaeus 1758	Howard 1955	1 specimen
	species a
Reptilia - Anseriformes - Presbyornithidae

	Telmabates antiquus n. gen., n. sp. Howard 1955	Howard 1955	10 individuals

	Telmabates howardae n. sp. Cracraft 1970	Cracraft 1970
Reptilia - Sebecidae

	Sebecus icaeorhinus n. gen., n. sp. Simpson 1937		2 individuals
	AMNH 3160 - holotype (disarticulated skull and mandible)
Reptilia - Boidae

	Waincophis australis n. gen., n. sp. Albino 1987	Albino 1987
	MACN-CH 1008 - holotype
Reptilia - Meiolaniidae

	Crossochelys corniger n. gen., n. sp. Simpson 1937	Simpson 1938	1 individual
	original and current combination Niolamia argentina
	AMNH 3161
Mammalia - Notoungulata - Isotemnidae

	Thomashuxleya externa Ameghino 1901	Simpson 1967	1 specimen
	AMNH 28677, mandible p2-m3

	? Pleurostylodon similis Ameghino 1901	Cifelli 1985
Mammalia - Notoungulata - Archaeopithecidae

	Archaeopithecus rogeri Ameghino 1897	Vera 2017
	AMNH FM 28534, MACN-A 10824a and MMdP-M 727
Mammalia - Derorhynchidae

	Microbiotherium gutierrezi n. sp. Del Corro 1977	del Corro 1977
	recombined as Coona gutierrezi

	Coona pattersoni n. gen., n. sp. Simpson 1948	Simpson 1938	1 specimen
	AMNH 28907
see common names

Geography

Country:	Argentina	State/province:	Chubut
Coordinates:	45.4° South, 67.7° West (view map)
Paleocoordinates:	47.9° South, 57.7° West
Basis of coordinate:	estimated from map
Geographic resolution:	small collection

Time

Period:	Paleogene	Epoch:	Eocene
Stage:	Ypresian	10 m.y. bin:	Cenozoic 2
Key time interval:	Casamayoran	Mammal zone:	Casamayoran
Age range of interval:	56.00000 - 47.90000 m.y. ago

Stratigraphy

Formation:	Sarmiento
Stratigraphic resolution:	bed
Stratigraphy comments: Bottom of bed III in measured section CF. This is a single horizon ("green bentonite with Sebecus, birds, etc.") within the Sarmiento Formation at Cañadon Hondo, and distinct from Rio Chico remains at the same locality (PBDB 14205). Casamayoran SALMA of Middle Eocene age

Lithology and environment

Primary lithology:	green claystone
Secondary lithology:	white tuff
Includes fossils?	Y
Lithology description: Green bentonite
Environment:	lacustrine indet.

Taphonomy

Modes of preservation:	body
Size of fossils:	macrofossils

Collection methods and comments

Collection excludes:	some genera
Collection methods:	field collection,survey of museum collection
Reason for describing collection:	taxonomic analysis
Museum repositories:	AMNH

Metadata

Database number:	39295
Authorizer:	J. Alroy, P. Mannion, J. Zijlstra	Enterer:	J. Wertheim, J. Zijlstra, J. Alroy, P. Mannion
Modifier:	M. Kouvari	Research group:	vertebrate
Created:	2004-05-25 15:38:07	Last modified:	2020-09-19 09:08:11
Access level:	the public	Released:	2004-05-25 15:38:07
Creative Commons license:	CC BY

Reference information

Primary reference:

10800.

G. G. Simpson. 1937. New reptiles from the Eocene of South America. American Museum Novitates 927:1-3 [J. Alroy/J. Wertheim/J. Wertheim]

Secondary references:

10721		A. M. Albino. 1987. Un nuevo Boidae (Reptilia: Serpentes) del Eoceno temprano de la Provincia del Chubut, Argentina. Ameghiniana 24:61-66 [J. Alroy/J. Wertheim/J. Wertheim]
57836		R. Cifelli. 1985. Biostratigraphy of the Casamayoran, Early Eocene of Patagonia. American Museum Novitates 2820:1-26 [J. Zijlstra/J. Zijlstra]
25108		J. Cracraft. 1970. A new species of Telmabates (Phoenicopteriformes) from the lower Eocene of Patagonia. The Condor 72(4):479-480 [J. Alroy/J. Alroy]
10615		G. del Corro. 1977. Un nuevo microbioterio (Marsupialia) del Eoceno de Patagonia. Revista del Museo Argentino de Ciencias Naturales "Bernadino Rivadavia" 2(2):31-33 [J. Alroy/J. Wertheim/J. Wertheim]
10799		H. Howard. 1955. A new wading bird from the Eocene of Patagonia. American Museum Novitates 1710:1-25 [J. Alroy/J. Wertheim/M. Uhen]
46371		D. Pol, J. M. Leardi, A. Lecuona and M. Krause. 2012. Postcranial anatomy of Sebecus icaeorhinus (Crocodyliformes, Sebecidae) from the Eocene of Patagonia. Journal of Vertebrate Paleontology 32(2):328-354 [P. Mannion/P. Mannion]
10797		G. G. Simpson. 1938. Crossochelys, Eocene horned turtle from Patagonia. Bulletin of the American Museum of Natural History 74:221-254 [J. Alroy/J. Wertheim/J. Wertheim]
10970		G. G. Simpson. 1938. A new marsupial from the Eocene of Patagonia. American Museum Novitates 989:1-5 [J. Alroy/J. Wertheim/J. Wertheim]
10312		G. G. Simpson. 1967. The beginning of the age of mammals in South America. Part II. Bulletin of the American Museum of Natural History 137:1-260 [D. Croft/D. Croft/K. Pino]
63245		B. Vera. 2017. Patagonian Eocene Archaeopithecidae Ameghino, 1897 (Notoungulata): systematic revision, phylogeny and biostratigraphy. Journal of Paleontology [P. Mannion/P. Mannion]